2007/03/20 by R. Bellazzini, G. Spandre, A. Brez +15
Engineering · Physics and Astronomy · #CCD and CMOS Imaging Sensors #Particle Detector Development and Performance #Photocathodes and Microchannel Plates #astro-ph #physics.ins-det #physics.med-ph
paper · pdf · doi:10.1016/j.nima.2007.07.098
published as Nucl.Instrum.Meth.A581:246-253,2007; Erratum-ibid.A585:105,2008 · 6 pages, 14 figures, presented at the 11th Vienna Conference on Instrumentation VIC 2007, submitted to Nuclear Instruments and Methods A
arxiv created 2007/03/20 · openalex publication_date 2007/08/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
We describe a UV photo-detector with single photon(electron) counting and imaging capability. It is based on a CsI photocathode, a GEM charge multiplier and a self triggering CMOS analog pixel chip with 105k pixels at 50 micron pitch. The single photoelectron produced by the absorption of a UV photon is drifted to and multiplied inside a single GEM hole. The coordinates of the GEM avalanche are reconstructed with high accuracy (4 micron rms) by the pixel chip. As a result the map of the GEM holes, arranged on a triangular pattern at 50micron pitch, is finely imaged.